# coding=utf-8
"""
Author: Mr.夏末
@Function: 递归
"""

# n的阶乘：n = n*(n-1)!,n=1,n!=1
def jc(n):
    # 这个就是递归的出口
    if n == 1:
        return 1
    # n! = n*(n-1)!
    return n * jc(n - 1)
print(jc(100))